I disagree with his claim that Americans don't expect ideas to matter because what really matters is material prosperity. That is, we think crime, terrorism, etc., are the effects of economic problems, not ideology. That probably is the view of secularists, who became increasingly numerous from the late 19th century on, but not of all Americans. However, his point is to debunk the view that ideology and ideas don't have consequences, so I am happy he's on my side (ideas have consequences) overall.
The interesting part begins with:
By contrast, ideological and memetic warfare has been a favored tactic for all of America’s three great adversaries of the last hundred years — Nazis, Communists, and Islamists. All three put substantial effort into cultivating American proxies to influence U.S. domestic policy and foreign policy in favorable directions. Yes, the Nazis did this, through organizations like the “German-American Bund” that was outlawed when World War II went hot. Today, the Islamists are having some success at manipulating our politics through fairly transparent front organizations like the Council on American-Islamic Relations.
But it was the Soviet Union, in its day, that was the master of this game. They made dezinformatsiya (disinformation) a central weapon of their war against “the main adversary”, the U.S. They conducted memetic subversion against the U.S. on many levels at a scale that is only now becoming clear as historians burrow through their archives and ex-KGB officers sell their memoirs.
...
On a different level, in the 1930s members of CPUSA (the Communist Party of the USA) got instructions from Moscow to promote non-representational art so that the US’s public spaces would become arid and ugly.
Americans hearing that last one tend to laugh. But the Soviets, following the lead of Marxist theoreticians like Antonio Gramsci, took very seriously the idea that by blighting the U.S.’s intellectual and esthetic life, they could sap Americans’ will to resist Communist ideology and an eventual Communist takeover. The explicit goal was to erode the confidence of America’s ruling class and create an ideological vacuum to be filled by Marxism-Leninism.
And they've been very successful. Below are some of the ideas Raymond identifies as promoted by Soviet disinformation programs.

